I know how to create BSC token. I have the source code but i want to learn presale function. Here's what i want to learn.
3 Phase Presale
Phase 1 - 1 BNB = 50.000 tokens
Phase 2 - 1 BNB = 35.000 tokens
Phase 3 - 1 BNB = 25.000 tokens
The end of time of presale, unsold tokens will turn back to the owner wallet.